The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1976
Filed:
May. 22, 1974
Applicant:
Inventors:
Howard E Munzel, Lexington, KY (US);
Carl A Queener, Lexington, KY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
96 / ; 96 / ; 252 / ; 427 14 ; 427 18 ; 427 20 ; 428900 ;
Abstract
A carrier bead is disclosed having a core and at least an outer coating of polytetrafluoroethylene or fluorinated ethylene propylene. Use of these fluoropolymers as carrier coatings results in extremely long carrier life and overcomes problems that have heretofore plagued the commercialization of a magnetic brush development system for a plain paper electrostatic copying apparatus.
Munzel, Howard. (1976). Electrostatic imaging method using a polytetrafluoroethylene coated (U.S. Patent No. 3947271). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3947271
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile